﻿#region Copyright(c) 2006 ZO, All right reserved.
// -----------------------------------------------------------------------------
// Copyright(c) 2006 ZO, All right reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   1.  Redistribution of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//   2.  Redistribution in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//   3.  The name of the author may not be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// -----------------------------------------------------------------------------
#endregion


#region Using directives

using System;
using ZO.SmartCore.Protocols.XMPP.Core;
using ZO.SmartCore.Protocols.XMPP.SASL.Core;
using ArgumentNullException= ZO.SmartCore.Core.ArgumentNullException;

#endregion

namespace ZO.SmartCore.Protocols.XMPP.SASL.Mechanisms
{
    /// <summary>
    /// SASL ANONYMOUS Mechanism, this allows anonymous logins to a server.
    /// </summary>
    public class AnonymousMechanism : BaseMechanism
    {

        /*
     S: <stream:features>
                 <mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>
                     <mechanism>DIGEST-MD5<mechanism>
                     <mechanism>ANONYMOUS<mechanism>
                 </mechanisms>
            </stream:features>
                        
         * So, the proper exchange for this ANONYMOUS mechanism would be:
            
         C: <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'/>
         S: <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>
            
         or, in case of the optional trace information:
            
         C: <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'>
                 c2lyaGM=
            </auth>
         S: <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>
            
*/

        #region Constructors

        #endregion

        #region Destructor

        #endregion

        #region Fields
        private const string MECHANISM_NAME = "ANONYMOUS";

        #endregion

        #region Events

        #endregion

        #region Operators

        #endregion

        #region Properties

        #endregion
        /// <summary>
        /// Get The Name of MechanismName
        /// </summary>
        /// <value></value>
        public override string Name
        {
            get { return MECHANISM_NAME; }
        }
        #region Methods
    



        /// <summary>
        /// initialized the xmpp client with mechanism
        /// </summary>
        public override void Initialize(XmppClient client)
        {
            if (client == null)
            {
                throw new ArgumentNullException("client");
            }

            if (!client.Connected)
            {
                throw new ObjectDisposedException("client");
            }

            client.Send(new Auth(MECHANISM_NAME));
        }
        #endregion
    }
}
